111222011 has 2 divisors, whose sum is σ = 111222012. Its totient is φ = 111222010.

The previous prime is 111221977. The next prime is 111222019. The reversal of 111222011 is 110222111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111222011 - 2²² = 107027707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111221983 and 111222001.

It is not a weakly prime, because it can be changed into another prime (111222019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611005 + 55611006.

It is an arithmetic number, because the mean of its divisors is an integer number (55611006).

Almost surely, 2^111222011 is an apocalyptic number.

111222011 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222011 is an equidigital number, since it uses as much as digits as its factorization.

111222011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 111222011 is about 10546.1846655556. The cubic root of 111222011 is about 480.9097489020.

Adding to 111222011 its reverse (110222111), we get a palindrome (221444122).

The spelling of 111222011 in words is "one hundred eleven million, two hundred twenty-two thousand, eleven".